PoC: Guard secret attributes against leaking to the logs V1.0

[shundhammer]

Proof of Concept [superseded]

Problem

Secret attributes of the wifi connection object might leak to the logs, e.g. if methods like inspect() are used.

Fix

Use a custom inspect() method that clones the original object and sanitizes all fields that should not be logged verbatim (replacing each one with a special string <sanitized>).

Related PR

Superseded by PR #1360 which uses attr_secret from YaST2::SecretAttributes.

[coveralls]

coverage: 80.8% (+0.02%) from 80.781%
when pulling 32ea09d on huha-fix-pw-leak
into 2ac81c0 on master.

[joseivanlopez]

I think SecretAttributes mixin could be useful here, see https://github.com/yast/yast-yast2/blob/master/library/general/src/lib/yast2/secret_attributes.rb.

[shundhammer]

Superseded by PR #1360 which uses secret_attr from YaST::SecretAttributes.